Influence of initial L-asparagine and glycerol concentrations on the batch growth kinetics of Mycobacterium bovis BCG



Document title: Influence of initial L-asparagine and glycerol concentrations on the batch growth kinetics of Mycobacterium bovis BCG
Journal: Brazilian journal of microbiology
Database: PERIÓDICA
System number: 000291078
ISSN: 1517-8382
Authors: 1






Institutions: 1Instituto Butantan, Centro de Biotecnologia, Sao Paulo. Brasil
Year:
Season: Oct-Dic
Volumen: 35
Number: 4
Pages: 337-344
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental
English abstract The influences of the L-asparagine and glycerol initial concentrations in Sauton medium on the productivities of biomass and colony forming units were studied. The submerged batch cultivations of Mycobacterium bovis were carried out in a 20 L bioreactor. The L-asparagine and glycerol initial concentrations of 4.54 g/L and 25 mL/L, respectively, corresponded to the best biomass productivity, namely 2.5 g/L.day. On the other hand, the concentrations of 2.27 g/L and 25 mL/L, respectively, led to the highest productivity in terms of colony forming units, namely 2.7·10(6) colonies/mg.day. In addition, by means of the relative consumption analysis of L-asparagine and glycerol (50 and 26% respectively), it was concluded that the concentrations of such components could be reduced, with respect to the original Sauton medium composition, aiming the obtainment of an optimal BCG vaccine production in the bioreactor
Portuguese abstract Estudou-se a influência das concentrações iniciais, no meio de Sauton, de asparagina e glicerol sobre as produtividades, expressas em unidades formadoras de colônias e biomassa microbiana, referentes aos cultivos submersos do Mycobacterium bovis, em biorreator de 20 mL. As concentrações iniciais de 2,27 e 25 mL/L de asparagina e glicerol, respectivamente, conduziram à maior produtividade, em unidades formadoras de colônias, a saber 2,7.10(6) colônias/mg.dia. Por outro lado, as concentrações de 4,54 e 25 mL/L dos mesmos componentes, corresponderam à melhor produtividade em biomassa, a saber: 2,5 g/dia. Através das análises dos consumos relativos de asparagina e glicerol (50 e 26% respectivamente), verificou-se também que as concentrações destes componentes podem ser reduzidas na composição original do meio de Sauton, com o objetivo de obter uma produção otimizada de vacina BCG em bioreator
Disciplines: Biología
Keyword: Microbiología,
Mycobacterium bovis,
Asparagina,
Glicerol,
Cinética de crecimiento,
Vacunas
Keyword: Biology,
Microbiology,
Mycobacterium bovis,
Asparagine,
Vaccines,
Glycerol,
Growth kinetics
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